

With the help of some squirrels, the machines make guesses, and Robert builds a seesaw and a jungle gym though they're not what Bob played with. Robert decides to build the kids a playground, like the one he built for his sons, but he can't remember what his "Bobby" used to play with. Bob offers to take care of it, so his parents can stay in the Valley, and Dot and Robert decide to look after the kids for Marjorie. Potts, who says that the school is closed because the roof needs repairing.

When the team teaches Marjorie's eco-house, they meet her children, Sonny and Saffron, who remind Robert and Dot of Bob and his twin brother, Tom, when they were that age. Robert notices Bob’s old rubble chute, and Bob explains that he will find a use for it.

Robert and Dot are visiting the Valley, and Bob shows them around.
